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- Based on the Fresnel diffraction integral, the analytical expression for the field distribution of converging spherical waves passing through an annular aperture is derived and some special cases are discussed. 摘要基于菲涅耳衍射积分公式,推导出了会聚球面波通过环形光阑后场分布的解析公式,并讨论了一些特殊情况。
- Equivalency of Fresnel Diffraction Integral and Slowly Varying Amplitude Approximation for Gaussian Beam 菲涅耳衍射积分与缓变振幅近似对高斯光束的等效性
- Fresnel diffraction integral 菲涅耳衍射积分
- The Fresnel diffraction formula and the Fourier transforms are used to get the intensity distribution formula. 采用菲涅耳衍射公式和傅里叶变换得出了输出面上的光场的理想计算公式。
- A new point of view is that if the angle between the normal dir-cetion of incident wave surface and Z axies is smaller, fresnel diffraction for-mation is still tru, and presented. 在此基础上,对费涅耳衍射近似条件作了讨论,提出此近似条件可表达为照明波波面法线与Z轴夹角很小时,费涅耳衍射成立的新论点。
- The intensity distributing and the contributing range for using the serrated aperture are analyzed based on Fresnel diffraction theory. 应用菲涅耳衍射光强分布理论以及光轴上光强分布理论对波纹光阑在一定条件下的作用范围进行了分析。
- The intensity ripples of Fresnel diffraction are suppressed and the filling factor is improved by using the serrated aperture. 从光路的实际使用效果看,对比圆孔光阑,应用波纹光阑在其作用范围内实现了对光束衍射调制的抑制和填充因子的提高。
- This paper introduced an optical setup to perform fractional Fourier transformation by Fresnel diffraction with a converging spherical wave illumination. 提出了在会聚球面波照明下,用菲涅耳衍射实现分数傅里叶变换的光学装置。
- Numerical results demonstrate the advantages of super-Gaussian and serrated apertures in suppressing Fresnel diffraction modulations and maintaining relatively large fill factor. 数值计算结果表明,超高斯光阑和锯齿光阑的优点是能有效抑制菲涅尔衍射调制并有较大的填充因子。
- A Collins.Lens-systems diffraction integral written in terms of matrixoptics[J].JOSA,1970,60:1168. 洪熙春;黄维刚;王绍民.;失调光学系统的衍射积分公式[J]
- Using convolution and fast Fourier transform(FFT) algorithm to calculate diffraction integral,the CGH is reconstructed by digital focus method. 通过卷积和快速傅立叶变换 (FFT)的方法计算衍射积分 ,以数字聚焦的方法进行再现。
- Based on Huygens-Fresnel diffraction integral theory, the propagation properties of Bessel beam were studied in this paper. 论文中,我们基于惠更斯-菲涅耳衍射积分理论研究了由轴棱锥产生的贝塞尔光束的传输特性,并且通过几何光学解析无衍射光束的聚焦特性。
- When the present generally used Kirchhoff diffraction integral formula faces difficulties of limited condition,the former viewpoint is more accurate. 当目前通用的基耳霍夫衍射积分公式因限制条件不满足而碰到问题时,则以前种观点分析为准。
- Using our method,the FFT program needs a little of computer memory to finish the calculation of Fresnel diffraction with the arbitrary interval of sampling and the demanded precision. This method can be extended conveniently to Collins? formula. 利用这种方法 ,只要用小容量 FFT程序 ,便能完成任意给定取样间隔或计算精度的菲涅耳衍射及柯林斯公式的计算
- Based on the theory of fractional Fourier transform (FRT) and one of its very important parameter, fractional order, the relationship between FRT and Fresnel diffraction are deduced and analyzed. 摘要基于分数傅里叶变换理论并以分数阶这一重要参量为纽带,推导和分析了分数傅里叶变换与菲涅耳衍射之间的关系;
- Based on the nonparaxial vector Rayleigh-Sommerfeld far-field diffraction integral formula, a vector expression for describing the far field of a semiconductor laser is proposed. 研究发现:在傍轴区域标量表达式不会引起太大的误差;
- The statistical properties of dynamic speckles produced in the Fresnel diffraction field by the rotating cylindrical object considered to be a weak phase screen are investigated in detail. 研究了当旋转圆柱体表面满足弱散射体条件时,在菲涅尔衍射场形成的动态散斑的统计特性;
- Application Fenman's Path integral theory into Fresnel diffraction 费曼路径积分理论在菲涅耳衍射场中的应用
- Basing on the light diffracting theory of Kirchhoff, we obtain the expression for the intensity of speckles in deep Fresnel diffraction region. 摘要利用基尔霍夫衍射理论分析了菲涅耳深区内的散斑场,得到了菲涅耳深区散斑光强的一般表达式。
- The Collins formula (1970) contacts the diffract integral of optical system complex with ABCD matrix and provides a mathematics tool for studying laser beams passing through paraxial ABCD optical system. 1970年Collins将复杂光学系统的衍射积分与ABCD矩阵元联系起来,推导出了Collins公式,为研究光束通过近轴ABCD光学系统的传输与变换提供了一个有效的工具。
